Sökning: "pH"

Visar resultat 1 - 5 av 1718 avhandlingar innehållade ordet pH.

  1. 1. Hydrogel-based pH-sensors Development and characterisation of optical and electrical pH sensors based on stimuli-responsive hydrogels

    Detta är en avhandling från Sundsvall : Mid Sweden University

    Författare :Krister Hammarling; Mittuniversitetet.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogel; fiber optics; printed electronics; pH; sensor;

    Sammanfattning : The ability to measure the chemical parameter pH is of high importance in many areas. With new government regulations and evolving markets, there is a strong motivation for improving such measurements and conducting research on new types of pH sensors and sensor materials. LÄS MER

  2. 2. Road network and GPS tracking with data processing and quality assessment

    Detta är en avhandling från Borlänge : Dalarna University

    Författare :Xiaoyun Zhao; Högskolan Dalarna.; [2015]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; GPS tracking; Reliability; Road network; visualized map; road network; Map-matching; P-median Model; Network density; Complex Systems – Microdata Analysis; Komplexa system - mikrodataanalys;

    Sammanfattning : GPS technology has been embedded into portable, low-cost electronic devices nowadays to track the movements of mobile objects. This implication has greatly impacted the transportation field by creating a novel and rich source of traffic data on the road network. LÄS MER

  3. 3. Soil-living archaea: Influence of pH, carbon and nitrogen on their abundance and activity

    Detta är en avhandling från Department of Biology, Lund University

    Författare :Anna Sterngren; Lunds universitet.; Lund University.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Archaea; ammonia-oxidizing archaea; soil; AOA; AOB; root exudates; gross nitrification; qPCR; pH; carbon cycle; nitrogen cycle;

    Sammanfattning : Popular Abstract in Swedish På 70-talet upptäckte man att en grupp mikroorganismer, som man tidigare katalogiserat som bakterier, bildade en helt egen grupp. Dessa kallades ärkebakterier och fick senare namnet arkéer. LÄS MER

  4. 4. Seawater pH as a Controlling Factor in Macroalgal Calcification and Photosynthesis

    Detta är en avhandling från Stockholm : Department of Botany, Stockholm University

    Författare :Immaculate Sware Semesi; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Calcareous macroalgae; CO2; mussels; pH; seagrasses; tropical lagoons; NATURAL SCIENCES Biology Organism biology Plant physiology; NATURVETENSKAP Biologi Organismbiologi Växtfysiologi; Plant Physiology; växtfysiologi;

    Sammanfattning : Biological calcification and photosynthesis are important processes with a great influence on both structure and function of oceanic ecosystems. The pH of the seawater has a strong influence on both these processes and therefore the impacts of different pH levels on calcareous macroalgae were investigated in laboratory and field experiments at Chwaka and Fumba Bays in Zanzibar, Tanzania. LÄS MER

  5. 5. Nanofiltration at elevated temperatures: Influence of the combined effects of temperature, salts, pH and cleaning

    Detta är en avhandling från Faculty of Engineering, LTH at Lund University

    Författare :Mattias Nilsson; Lunds universitet.; Lund University.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elevated temperatures; Electroviscous friction; Energy; pH; Economics; Nanofiltration; Pre-treatment; Salt; Swelling; Membrane performance; Cleaning; Temperature;

    Sammanfattning : The influence of temperature, salts, pH, and various pre-treatments and cleaning on the nanofiltration (NF) performance of thin-film polyamide (PA) composite membranes has been investigated. The change in membrane performance was correlated to membrane swelling or/and electroviscous friction. LÄS MER